Finding the Fourth Proportional to 70.34, 105.25 and 42.82

Step by Step Solution

1. Step 1: Write the proportion equation
   70.34 : 105.25 = 42.82 : x
2. Step 2: Convert to fraction form
   70.34/105.25 = 42.82/x
3. Step 3: Cross multiply
   70.34x = 105.25 × 42.82
4. Step 4: Simplify right side
   70.34x = 4,506.81
5. Step 5: Solve for x
   x = 4,506.81/70.34
6. Step 6: Final answer
   x = 64.07